1.) A plasmid used as a cloningvecotr in E. coli must have
A) unique restriction sites.
B) an ori sequence
C) a selectable marker.
D) all of the above
E) B and C only
2.) Vecotrs capable of entering bothprokaryotic and eukaryotic cells have
A) omnivectors.
B) dual vecotrs.
C) shuttle vectors.
E) universal vecotors.
3.) In DNA electrophoresis, fragmentseperation is based on
A) fragment nucleotide content.
B) fragment size.
C) fragment sequence
D) all of the above